Pry chip good. Materials. The material of the PRy chip is aluminum alloy, and the material of the wafer chip is silicon, which is extracted from quartz sand, compared with PRy coreAll right. Word of mouth.
Purui and Cree is a level of the wafer and the domestic SAN 'an is a level of pure from the chip, Purui is better than the wafer. However, many times are affected by the packaging process, and the chip is not necessarily good, the effect is good.
The United States Corey and Taiwan Tongjia chips are chips for high-end products, and the chips are relatively popular and commonly used. There are many domestic chip brands, and the technology and materials need to be improved. However, it is difficult to buy real chips in the United States, and our company has used Taiwan Tongjia chips for several years, and the quality is still relatively stable. Use a little bit of chip once in a while.
If it is composed by elements: binary, three, four. Such as GaN, GaAs; GaAlAs; AlGaInP, etc. If divided by manufacturers: Japan's Nichia, Toyota synthesis; American Corey, Puri, lumen; Germany Osram, etc. If according to the wavelength type: visible light, infrared light, etc. If according to power: high power chip, low power chip, etc.
High brightness blue LED chip structure: Luminous principle: LED itself can emit light, but the wavelength is short, the longest is blue light, that is to say, blue LED can rely on its own blue light to achieve. To glow white, you need to glowD chip production process
1, the chip on the blue film will do the final eye inspection test with the same standard as the first eye inspection to ensure that the chip is arranged neatly and the quality is qualified. In this way, LED chips are made (currently referred to as square chips on the market).
2, LED pressure welding process has two kinds of gold wire ball welding and aluminum wire pressure welding. The picture on the right is the process of aluminum wire pressure welding, first press the first point on the LED chip electrode, and then pull the aluminum wire to the corresponding bracket, press the second point and then pull off the aluminum wire.
3, MOCVD epitaxial furnace is the most commonly used equipment for the production of LED epitaxial sheets.
4, for blue and green LED chips on sapphire insulating substrate, the insulating glue is used to fix the chip. The difficulty of the process is the control of the dispensing amount, and there are detailed process requirements in the colloidal height and dispensing position.
5, welding wire: with a gold wire to chip and support through. Pre-test: Preliminary test can not light. Glue: Wrap the chip and bracket with glue. Long bake: Let the glue set. Post-test: test whether it can be bright or not and whether the electrical parameters are up to standard.
Cob in the field of light source is the abbreviation of Chip on Board, meaning chip packaging substrate, is a LED lamp module. Cob light source is a number of LED chips affixed to a substrate, light in a certain area, forming a more uniform light source.
COB is the abbreviation of Chip On Board, that is, "chip packaging substrate", which is a new type of high-brightness LED light source technology. COB light source has a high brightness and uniform light distribution, does not produce glare and shadows, providing better lighting effects and comfort.
cob lightThe source is the LED chip directly affixed to the high reflective mirror metal substrate of high light efficiency integrated surface light source technology, this technology eliminates the concept of support, no plating, no reflow, no patch process, so the process is reduced by nearly one-third, the cost is also saved by one-third.
COB light source is a high light efficiency integrated surface light source technology in the LED chip directly affixed to the high reflective mirror metal substrate, this technology eliminates the concept of support, no plating, no reflow, no patch process, so the process is reduced by nearly one-third, and the cost is saved by one-third.
The difference between Taiwan chip and domestic SAN 'an LED chip is: different varieties, different light decay, different uses. Different varieties of Taiwan wafer: Taiwan wafer LED chip product category for ordinary products, no special products. SAN 'an domestic LED chip: SAN 'an domestic LED chip varieties include conventional products and special products.
Chip is indeed divided into AB products, but good A product, as far as the crystal is concerned, the best chip, before the factory by the shareholders of the crystal, domesticThe packaging factory of the first line of big brands was purchased (the cooperation agreement between shareholders, they have priority), such as Lite-on, Billion Light, etc., the market circulation is not estimated to be much.
SAN An: The grade is slightly lower than Taiwan optical epitaxy Lu Mei: The market is relatively less than the optical epitaxy, but the grade is similar. LED (LightEmittingDiode) chip is a solid-state semiconductor device, which can directly convert electricity into light.
Principle Different LED chips: The two electrodes are on the same side of the epitaxial sheet, and because the electrodes are on the same side, the current is n- and p-Transverse flow in the type limiting layer is not conducive to the diffusion of current and heat dissipation.
LED chip: also known as led light chip, is the core component of led lamp, that is, refers to the P-N junction. A solid-state semiconductor device. Lamp bead: light emitting diode abbreviation for LED. Wafer: is the core part of the LED, a single grain is fixed on the plastic or ceramic chip base.
LED chip is also called LED light chip, yesThe core component of the LED lamp, that is, the P-N junction. At present, the global LED chip market pattern is roughly divided into three camps: domestic manufacturers, Taiwan manufacturers and foreign LED chip manufacturers.
The led chip is the light-emitting diode chip, that is, the lighting chip you say. In essence, it is a pn section, where electrons and holes are combined in the depletion layer of the pn section, and the extra energy after composite is emitted in the form of photons, that is, the light is illuminated.